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Dual-emission Si dots-based sensing array for identification of metal ions

文献类型： 外文期刊

作者： Mao, Guobin 2 ; Zeng, Yuan 2 ; Ding, Guangmiao 1 ; Qiu, Chunmin 2 ; Dai, Junbiao 2 ; Wan, Yanhui 1 ; Ma, Yingxin 2 ;

作者机构： 1.Shenzhen Univ, Shenzhen Peoples Hosp 2, Thorac Surg, Affiliated Hosp 1, Shenzhen 518000, Peoples R China

2.Chinese Acad Sci, Shenzhen Inst Synthet Biol, Shenzhen Inst Adv Technol, Shenzhen Key Lab Synthet Genom,Guangdong Prov Key, Shenzhen 518055, Peoples R China

3.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr,Key Lab Synthet B, Shenzhen 518000, Peoples R China

4.Henan Univ, Sch Life Sci, Kaifeng 475004, Peoples R China

5.Henan Univ, Shenzhen Res Inst, Shenzhen 518000, Peoples R China

关键词： Heavy metal ions; Fluorescence sensor array; Si dots; Two emission centers; Rapid detection

期刊名称：SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY （ 影响因子：4.6； 五年影响因子：4.3 ）

ISSN： 1386-1425

年卷期： 2025 年 329 卷

页码：

收录情况： SCI

摘要： Achieving rapid recognition and sensitive detection of multiple heavy metal ions simultaneously is of great significance for the monitoring of public health and environment. Herein, a fluorescence sensing array was constructed using Si dots with two emission centers for efficient discrimination of seven metal ions. Each metal ion had different binding capacities with -OH/-NH2 groups present on the surface of Si dots and thereby resulting in different changes in fluorescence intensity of the two emission peaks. The changes in fluorescence signals were transformed into unique "fingerprints" and "Euclidean distances" through linear discriminant analysis and hierarchical cluster analysis. The constructed sensing array provided multi-dimensional information to distinguish seven metal ions through a single material and a signal mode and show good linearity for individual metal ion and good performance in the discrimination of metal mixtures, effectively reducing the cost and response time and simplifying the experimental process. This system achieved accurate discrimination of metal ions in actual water samples and has broad application prospects in environmental monitoring.

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